"The shaded box looks like a nice place to build a house. Which is lucky, because it's the only place they'll let you build it!"

―Homer about how to place the house.

"Square One" is the first quest category in The Simpsons: Tapped Out and the quest in the category is "Build the Simpson House". In the quest, the player has to build the Simpson House. After completing the quest, the player has enough to move onto the next level. This quest is one of the few "Place ... in the shaded in area." quests.